Disposable oven liner



Feb. 13, 1968 H. B. KIMBLE 3,368,732I

DISPOSABLE OVEN LINERi Filed NOV. 30, 1964 FIG. I

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FIG. 2

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United States Patent O 3,368,732 DISPOSABLE OVEN LINER Helen B. Kimble,3555 Atwater St., Apt. 301, Montreal, Quebec, Canada Filed Nov. 30,1964, Ser. No. 414,816 Claims priority, application Canada, Aug. 22,1964,

' 910,105 2 Claims. (Cl. 229-31) This invention relates to a disposableoven liner and, in particular, to a disposable oven liner the size ofw-hich can be easily varied.

It is well known that during normal use, the walls and floor of an ovenin a conventional stove or range become coated with hydrocarbon depositswhich, at best, are diicult to remove.

There are presently commercially available various cleaning compoundsintended to remove the deposits, but which must be applied to the wallsand door of the oven and left standing for a relatively lengthy periodof time during which time the oven cannot be used. Furthermore, ovencleaning compounds often contain highly reactive and consequentlydangerous reagents.

Various forms of oven liners have been proposed to alleviate the needfor such cleaning compounds. However, most of the prior oven liners areof relatively complicated structure and are intended for use in ovens ofone size.

It is, therefore, the object of the present invention to provide aninexpensive, simply constructed, disposable oven liner which is variablein size and which can be easily inserted into conventional ovens ofvarying sizes.

According to one aspect, the invention relates to a one-piece blankadapted to form an oven liner having a base, mutually opposed side wallsand an end wall normal to and connecting said side walls, said blankcomprising a relatively thin sheet of heat-reliecting material, saidblank including a pair of parallel iirst fold lines each spaced apredetermined distance from an adjacent marginal side edge of saidblank, the latter being adapted to be folded along said rst fold linesto form said side walls; a second fold line normal to said first foldlines, and spaced a predetermined distance from an adjacent marginalside edge o f said blank, the latter being adapted to be foldedalongsaid second fold line to form said end Wall; a pair of diagonalfold lines each extending from the intersection of a said first and saidsecond fold line to an adjacent corner of said blank, the latter beingadapted to be folded along each said diagonal fold line to form a cornerpleat extending parallel with a selected said wall; said base beingdefined by said first and second fold lines and the remaining freemarginal side edge of said blank; and at least one pair of spacedadditional parallel fold lines extending across said blank, the latterbeing adapted to be folded along said additional fold lines to vary thearea of said base.

According to another aspect, the invention relates to a disposable ovenliner formed from a one-piece blank of relatively thin heat-reectingmaterial, said oven liner including a pair of mutually opposed sideWalls of variable height; an end wall, also of variable height, normalto and connecting said side walls; and a base of variable area to permitthe use of the oven liner in ovens of varying sizes.

The invention will now be described in detail with reference to theaccompanying drawings which show, by way of example, three embodimentsof the invention, and wherein:

FIGURE 1 is a plan view of one embodiment of the one-piece blank beforeassembly of an oven liner;

FIGURE 2 is a plan view of a second embodiment of the carton blankbefore assembly; and

ice

FIGURE 3 is a perspective view of an oven liner constr-ucted from theblank of FIGURE 1.

Referring to the drawings, and in particular to FIG- URE 1, a blankgenerally indicated at 1, for forming an oven liner in accordance withthe present invention includes a pair of iirst fold lines 3 and 5 whichare parallel to opposed, parallel side edges 7 and 9 of the blank. Theblank can be folded about the fold lines 3 and 5 to form side walls 4and 6, as shown in FIGURE 3. The height of side Walls 4 and 6 can bevaried by changing the position of the fold lines 3 and 5 with respectto the marginal side edges 7 and 9.

A second fold line 11 is provided adjacent a third marginal side edge 13of the blank and the blank can be folded along the fold line 11 to formen-d Wall 12, shown in FIGURE 3 of the drawings. Fold lines 3 and 11,and 5 and 11, intersect each other adjacent the corners 15 and 17 of theblank, respectively. Diagonal fold lines 16 and 18 extend from theintersection of the first and second fold lines to the adjacent corners15 and 17, respectively. The fold lines 16 and 18 facilitate theconstruction of the oven liner from the blank as will be described indetail hereinafter.

The fold lines 3, 5 and 11, and marginal side edge 19 of the blankdefine a base portion 21 of the blank. The base 21 of the blank isprovided with a pair of longitudinally extending fold lines 23 and 25,along which the blank can be folded to vary with the Width of the ovenliner, as shown in FIGURE 3. The base 21 of the blank, as shown inFIGURE 2, can further be provided with transversely extending fold lines27 and 29 along which the blank can be folded to vary the length of theoven liner.

It Will be appreciated that either the fold lines 23 and 25 or the foldlines 27 and 29 would be sufficient to vary the area of the base` 21,and that other fold lines can be provided on the base for Varying thearea of the base. Such other fold lines could be parallel to the firstor second fold lines or they could extend across the blank obliquely tothe fold lines 3 and 5.

To assemble the oven liner the blank is folded along the longitudinallyextending fold lines 23 and 25, to obtain a base 21 having the requiredwidth. The blank can then be folded along fold lines 27 and 29 to givethe base 21 t-he required length.

The blank is then folded along fold lines 3 and 5 to form side Walls 4and 6, along fold line 11 to form the end wall 12, and along diagonalfold lines 16 and 18 to form a pleat which can be folded to extend alongeither of the side walls 4 and 6 or the end Wall 12. The spacing of thefold lines 3, 5, and 11 from the marginal side edges 7, 9 and 13respectively, can be varied to vary the height of side and end walls 4,6 and 12 respectively.

A further feature of the invention is the provision of spaced apartVentilating holes 31 in the base 21 of the oven liner, the holes 31 arepreferably 1A in diameter and extend from the front to the rear edges ofthe oven liner along lines parallel to the side Walls 4 and 6 and endwall 12. T-he Ventilating holes 31 permit an even ow of heat through theoven liner and thus ensure that the thermostatic control of an ovencontaining the oven liner is not affected by the presence of the ovenliner.

I claim:

1. A one piece blank of relatively thin aluminum sheet adapted to form aliner for ovens of varying sizes, said blank having portions for forminga base, mutually opposed side walls and au end wall normal to andconnecting said side walls, said blank including a pair of paralleliirst fold lines each spaced a pre-determined distance from an adjacentmarginal side edge of said blank, the latter being adapted to be foldedalong said first fold Patented F eb.A 13, 1968 lines to form said sidewalls; a second fold line normal to said rst fold lines, and spaced apre-determined distance from an adjacent marginal side edge of saidblank, the latter being adapted to be folded along said second fold lineto form said end Wall; a pair of diagonal fold lines each extending fromthe intersection of a said first and said second fold line to anadjacent corner of said blank, the latter being adapted to be foldedalong each said diagonal fold line to form a corner pleat extendingparallel with a selected said wall; said base being dened by said irstand second fold lines and the remaining free marginal side edge of saidblank; and at least one pair of spaced additional parallel fold linesparallel to said first fold line extending across said blank, the latterbeing adapted to be folded into pleats along said additional fold linesto vary the area of said base, said pleats being laid ilat on said base.

2. A blank as claimed in claim 1 wherein said additional parallel foldlines are also parallel to said second fold line.

References Cited UNITED STATES PATENTS 704,328 7/1902 Hemry. 1,898,9622/193-3 Hvistendahl. 2,673,003 3/1954 Stewart. 2,806,227 9/ 1957Arbetter. 3,192,917 7/1965 Baert 126-19 3,211,082 10/1965 Sachnoff et al12639 X FOREIGN PATENTS 130,910 I/ 1929 Switzerland.

OTHER REFERENCES Reynolds Wrap advertisement received in Oice February1955.

FREDERICK KETTE-RER, Primary Examiner.

1. A ONE PIECE BLANK OF RELATIVELY THIN ALUMINUM SHEET ADAPTED TO FORM ALINER FOR OVENS OF VARYING SIZES, SAID BLANK HAVING PORTIONS FOR FORMINGA BASE, MUTUALLY OPPOSED SIDE WALLS AND AN END WALL NORMAL TO ANDCONNECTING SAID SIDE WALLS, SAID BLANK INCLUDING A PAIR OF PARALLELFIRST FOLD LINES EACH SPACED A PRE-DETERMINED DISTANCE FROM AN ADJACENTMARGINAL SIDE EDGE OF SAID BLANK, THE LATTER BEING ADAPTER TO BE FOLDEDALONG SAID FIRST FOLD LINES TO FORM SAID SIDE WALLS; A SECOND FOLD LINENORMAL TO SAID FIRST FOLD LINES, AND SPACED A PRE-DETERMINED DISTANCEFROM AN ADJACENT MARGINAL SIDE EDGE OF SAID BLANK, THE LATTER BEINGADAPTED TO BE FOLDED ALONG SAID SECOND FOLD LINE TO FORM SAID END WALL;A PAIR OF DIAGONAL FOLD LINES EACH EXTENDING FROM THE INTERSECTION OF ASAID FIRST AND SAID SECOND FOLD LINE TO AN ADJACENT CORNER OF SAIDBLANK, THE LATTER BEING ADAPTED TO BE FOLDED ALONG EACH SAID DIAGONALFOLD LINE TO FORM A CORNER PLEAT EXTENDING PARALLEL WITH A SELECTED SAIDWALL; SAID BASE BEING DEFINED BY SAID FIRST AND SECOND FOLD LINES ANDTHE REMAINING FREE MARGINAL SIDE EDGE OF SAID BLANK; AND AT LEAST ONEPAIR OF SPACED ADDITIONAL PARALLEL FOLD LINES PARALLEL TO SAID FIRSTFOLD LINE EXTENDING ACROSS SAID BLANK, THE LATTER BEING ADAPTED TO BEFOLDED INTO PLEATS ALONG SAID ADDITIONAL FOLD LINES TO VARY THE AREA OFSAID BASE, SAID PLEATS BEING LAID FLAT ON SAID BASE.